Firefox has a new exciting extension, called Yip. In Linux/Ubuntu, it brings standard Mozilla pop-up notifications ( the Thunderbird type of Taskbar tray pop-up mail-notification) for web applications to your Firefox browser.

Tests can be carried out with web applications that have notifications implemented like Meebo, Filttr – – a twitter web application and client.
Using Filttr and Yip gave me the screenshot you see above.

If you’re into scripting, then make good use of the Fluclass API and instructions on the Yip website to make your website support notifications.

Yip is free and open source. It works on Linux, Windows and has growl support for Mac.